688725232 has 20 divisors (see below), whose sum is σ = 1437052120. Its totient is φ = 317873088.

The previous prime is 688725229. The next prime is 688725277. The reversal of 688725232 is 232527886.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1655382 + ... + 1655797.

It is an arithmetic number, because the mean of its divisors is an integer number (71852606).

Almost surely, 2^688725232 is an apocalyptic number.

It is an amenable number.

688725232 is an abundant number, since it is smaller than the sum of its proper divisors (748326888).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

688725232 is a wasteful number, since it uses less digits than its factorization.

688725232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3311200 (or 3311194 counting only the distinct ones).

The product of its digits is 322560, while the sum is 43.

The square root of 688725232 is about 26243.5750613364. The cubic root of 688725232 is about 883.1110751920. Note that the first 3 decimals are identical.

The spelling of 688725232 in words is "six hundred eighty-eight million, seven hundred twenty-five thousand, two hundred thirty-two".